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Heart|Natural|GIA

1.51ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 6511530906

Certificate GIA 6511530906

Diamond specifications and retailer prices

From $7,583 AUD
£4,194 GBP
As of October 31, 2026
Save $6,505 AUD (46%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $14,088 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6511530906. Listed at 9 retailers as of October 30, 2026, with prices from $7,583 to $14,088, a $6,505 spread on the same certified stone. NZ Jewellers lists it at $14,088. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.52°
Pavilion angle41.99°
OriginNatural
Grading LabGIA
CertificateGIA 6511530906
Dimensions6.98 × 8.02 × 4.83 mm
L/W Ratio1.15
Top View
6.98 mm8.02 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6511530906
Side View
Table 61.0%Crown 36.52°Girdle: Slightly Thick to ThickPavilion 41.99°Culet: NDepth 60.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $14,088 AUD|Low: $7,560 AUD|High: $14,404 AUD|Avg: $9,664 AUD|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2$7,583 AUD
Retailer 3$7,905 AUD
Retailer 8$8,207 AUD
Retailer 4$8,423 AUD
Retailer 5$8,423 AUD
Retailer 9$8,514 AUD
Retailer 6$8,574 AUD
Retailer 7$12,477 AUD
NZ Jewellers$14,088 AUD

45 data points across 9 retailers

9 retailers$7,583 AUD to $14,088 AUD

A
Cheapest Retailer
-
$7,583 AUD
£4,194 GBP
A
Retailer 2
-
$7,905 AUD
£4,372 GBP
View
B+
Retailer 3
-
$8,207 AUD
$5,765 USD
View
A
Retailer 4
-
$8,423 AUD
$5,917 USD
View
A
Retailer 5
-
$8,423 AUD
$5,917 USD
View
Retailer 6
-
$8,514 AUD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
$8,574 AUD
$6,023 USD
View
B+
Retailer 8
-
$12,477 AUD
£6,901 GBP
View
Most Expensive
B
NZ Jewellers
8134b5e0-c12e-4565-9ea7-62757ff29826 · Oct 30
$14,088 AUD
$9,896 USD
View
8 more retailers have this diamond
Prices start from $7,583 AUDSave up to $6,505 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Heart
$7,583 AUD